Conor McGregor obtains California boxing licence

MMA superstar Conor McGregor has obtained a professional boxing licence to further fuel rumours he will switch disciplines to seek a fight with Floyd Mayweather Jr.

McGregor was issued with a licence by the state of California on Wednesday, meaning speculation surrounding the outspoken Irishman and undefeated pound-for-pound boxing great Mayweather is unlikely to relent.

McGregor, 28, is the current UFC lightweight champion and former UFC featherweight champion, a title stripped from him on Monday. Mayweather, 39, says he's "happily retired" after going 49-0 over his career while winning championships in five weight classes.

McGregor, who is 21-3 as an MMA fighter after his lightweight-title win over Eddie Alvarez earlier this month, and Mayweather have teased a potential fight since McGregor tweeted a mock poster in May.